Lt. Mark Alan Weiss was the second off-duty Navy SEAL to die in the past two months. Photo: Courtesy of the Navy

A cause of death was not revealed. The other serviceman, who was not identified, is receiving medical treatment for unspecified injuries.

Weiss, 35, was a Michigan native assigned to Special Boat Team 12, Navy Special Warfare Group 4 based in Coronado, California, according to the San Diego Union-Tribune. He had been serving as part of the United States Africa Command, also known as AFRICOM, prior to the incident.

A former enlisted SEAL, Weiss was commissioned in 2011 following his participation in the Seaman-to-Admiral 21 program at the University of Utah.

A veteran of the war in Iraq, his decorations included the Bronze Star Medal with a Combat "V" and the Navy Marine Corps Commendation Medal with a Combat "V" for battlefield valor.

"Our thoughts and deepest sympathies go out to their families during this difficult time," the Ethos Live blog wrote.

Sadly, this was the second death of an off-duty Navy SEAL in the past two months. While on leave on Sept. 30, Cmdr. Seth A. Stone, 41, of Houston, Texas, died in a skydiving accident in Perris, California.

The highly decorated SEAL fell to his death when his parachute failed to open properly after jumping from a hot air balloon, according to the Federal Aviation Administration, the Union-Tribune reported.